Abstract: Experimental results on sorption-induced deformation during npentanedesorption were obtained by in-situ dilatometry and in-situ small angleX-ray scattering (SAXS). The sample investigated was a silica-based monolithwith hierarchical pore structure comprising amacroporous network of struts,each strut containing well-defined cylindrical mesopores ordered on a 2D hexagonallattice.